Stm32446RE is there a simple chart that states which pins are usable for just I/O

[Izik]

Hello, 

I was just wondering if there was a list in the datasheet that has a Y/N for usability with the pins on the stm32F446RE or family. I mostly keep running into the issue where I configure something on a pin and then run into a pin that is being used for something else as well. I know a few are for com ports like St-link which I believe is PA-7 and when using that pin it no longer links the board.

I looked through the data sheet and the closest I found was table 11 which just explains the uses in the AF-0 column. It would also be helpful to have for troubleshooting so I know if there is a fried pin/poor code / pin in use.

Thanks!

[TDK]

The datasheet tells you what each pin can do. Table 11 as you found tells what peripherals are connected to each pin. Table 10 shows the same thing in a different order.

CubeMX can help assign pins for peripherals without overlapping. All pins (other than power/special ones) can do GPIO.

You generally want to avoid the SWD pins and pins needed for debug. This includes the ST-Link VCP if you're using it. If you're not, those pins are still connected on the board and can be used however you want.

[Issamos · Accepted solution]

Hello @Izik 

The best way to see all the I/O you can use is to check the Schematic Pack.

Best regards.

II